RetroFE/Configuration/Configuration/View/AddRemoveList.xaml

<UserControl x:Class="Configuration.View.AddRemoveList"
             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
             xmlns:d="http://schemas.microsoft.com/expression/blend/2008" 
             mc:Ignorable="d" 
             d:DesignHeight="300" d:DesignWidth="300">
    <UserControl.Resources>
        <ImageSource x:Key="AddIcon">/Assets/Icons/Add.png</ImageSource>
        <ImageSource x:Key="DeleteIcon">/Assets/Icons/Delete.png</ImageSource>
        
        <Style x:Key="AddButtonStyle" TargetType="{x:Type ToggleButton}">
            <Setter Property="Padding" Value="1" />
            <Setter Property="Background" Value="Transparent" />
            <Setter Property="BorderBrush" Value="Transparent" />
            <Setter Property="BorderThickness" Value="0" />

            <Setter Property="Content">
                <Setter.Value>
                    <Image Source="{StaticResource AddIcon}"  Height="15"/>
                </Setter.Value>
            </Setter>
        </Style>
        <Style x:Key="DeleteButtonStyle" TargetType="{x:Type Button}">
            <Setter Property="Padding" Value="1" />
            <Setter Property="Background" Value="Transparent" />
            <Setter Property="BorderBrush" Value="Transparent" />
            <Setter Property="BorderThickness" Value="0" />

            <Setter Property="Content">
                <Setter.Value>
                    <Image Source="{StaticResource DeleteIcon}"  Height="15"/>
                </Setter.Value>
            </Setter>
        </Style>


    </UserControl.Resources>

    <Grid>
        <Grid.RowDefinitions>
            <RowDefinition Height="*" />
            <RowDefinition Height="auto" />
        </Grid.RowDefinitions>

        <ListBox Grid.Row="0" 
                 SelectionMode="Single"
                 ItemsSource="{Binding RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type UserControl}}, Path=ListItemsSource, Mode=TwoWay}" 
                 DisplayMemberPath="{Binding RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type UserControl}}, Path=ListDisplayMemberPath}"
                 SelectedItem="{Binding RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type UserControl}}, Path=SelectedItem,Mode=TwoWay}"
                 Name="List" />

        <StackPanel Grid.Row="1" Orientation="Horizontal">

            <Popup Name="AddPopup" IsOpen="{Binding IsChecked, ElementName=AddButton, Mode=TwoWay}">
                <Border Background="White" BorderThickness="1" BorderBrush="Black">
                    <StackPanel Orientation="Horizontal">
                        <TextBlock>Name</TextBlock>
                        <TextBox Width="100" Name="AddName"/>
                        <Button Content="Add" 
                                Click="HideAddPopup"
                                Command="{Binding RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type UserControl}}, Path=AddListItemCommand}"
                                CommandParameter="{Binding Text, ElementName=AddName}">
                        </Button>
                    </StackPanel>

                </Border>
            </Popup>

            <ToggleButton Name="AddButton" Style="{StaticResource AddButtonStyle}"/>
            <Button Style="{StaticResource DeleteButtonStyle}" Command="{Binding RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type UserControl}}, Path=RemoveListItemCommand}" />

        </StackPanel>            
    </Grid>
</UserControl>